Very cool work here. I'm just playing with it right now, but have some real number to punch in soon. I'm gearing up to make two bellows, one tapered and one square, so this is going to be very useful. Thanks again, and, Well Done!

Yeah, a library of things such as this would be great - would make finding them a lot easier. There is much I need to learn, and the 'search words' are not always 'correct' for what I want to find --> computer illiterate (I work with em, but I don't use them very well). But a library, that I know how to use. Even just an index would be good.